The statement came after Lowell watched Abraham's sex tape and said she sounded like a "dying horse."

Abraham said she is unfazed by the criticism.

"I know what jealousy looks like," she said. "I am trying to be a role model for the other Teen Moms. I try not to knock them down. I try to better them."

"Catelynn has a weight issue, but I don't say harsh things about her to hurt her self-esteem."

Abraham's sex tape with James Deen was released on May 6. Called "Farah Superstar: Backdoor Teen Mom," the video was bought by Vivid for millions. It also attracted many watchers, as the site had to shut down after it had more than 2 million visitors in the first 12 hours of posting it. It soon was brought back online once the company had implemented more servers.